The Plays of Aristophanes (debauchery, how to cook and serve excrement)
Gargantua and Pantagruel by Rabelais (genital shaving and more ways to serve excrement)
Satyricon (50 shades of Rome)
Martial’s Epigrams (ancient Roman porn)
Chaucer's the Miller's Tale (ass-licking)
Chaucer's The Wife of Bath - (steamy sex reminiscences and the first use of the c word in written English)
Fanny Hill by John Cleland (a teenage prostitute tells all)
Les Bijoux Indiscrets by Diderot (what to do with your genitals in an African harem)
One Thousand and One Nights (a king does things with a different virgin every night for just over 1,000 nights)
A Ramble in St James Park poem by John Wilmot (shocking, just shocking)
The Rainbow by DH Lawrence (hot lesbian sex)
The Last Temptation of Christ by Nikos Kazantzakis (if only because Jesus has sex)